Machine for pulling shoes off the last



No.v.- 24, 1936.

J. A. BATA MACHINE FOR PULL ING SHOES OFF THE LAST Filed June 16, 1956 2 Sheets-Sheet 1 NOV. 24, 1936. J BATA 2,062,083

MACHINE FOR PULLING SHOES OFF THE LAST Filed June 16, 1936 2 Sheets-Sheet Patented Nov. 24, 1936 UNITED STATES PATENT OFFICE MACHINE FOR PULLING SHOES OFF THE LAST Jan A. Bata, Zlin, Czechoslovakia 4 Claims.

This invention relates to a machine for pulling a shoe off the last, in which shoe and last are pressed against the pulling off tool which moves in a vertical direction and acts in such a manner on the heel part of the shoe upper that the shoe is pulled ofi the last.

The machines of this kind, which have been hitherto mechanically operated, usually had the disadvantage, that in the case of an increased pressure the heel part of the shoe was damaged by the rotating roller-shaped pulling-off tool or the sliding pulling-off tool. Other similar machines were arranged for hydraulic or pneumatic operation of the pressure applying and pullingoff tool, but such an arrangement increased the cost both of the construction and operation of the machine, moreover a machine of this kind was easily damaged and had a relatively low output.

The object of the invention is a perfecting of mechanically operated pulling-off machines, so that, regardless of the manner of drive or the amount of pressure applied, there will be no damage to the heel part of the shoe of any size.

The pulling-off machine according to the invention is so arranged that, after becoming partially worn, it can be turned or reversed, so that its durability is very great.

In the drawings a constructional example of the machine according to the invention is illustrated.

Fig. 1 is a section through the upper part of the pulling-off machine and through the rocking support for the last and shoe according to the invention.

Fig. 2 is a section through the lower part of the pulling-01f machine with the means for putting the pulling-oif tool out of operation and a lever system of the pressure-applying tool according to the invention.

Fig. 3 is a section through the pulling-01f tool according to the invention.

The shoe l is drawn on to the last 2 which is placed on the milled peg 3 of the supporting member 4 (Fig. 1). This supporting member 4 is in the form of a two-armed lever which in its middle part is pivotally mounted on the pin 5, which latter is slidably fixed in the longitudinal slot 6 on the cast iron standard I. The pin 5 can be displaced, in accordance with the size of the shoe to be pulled off, in the slot 6 by means of the screw 8, at the end ofv which the hand wheel 3 is keyed on. The screw 8 can turn loosely in the opening and its longitudinal motion is limited by means of the plate III which is fixed by two screws II. The motion of the supporting member 4 is limited by the stop l2 which in its extr-eme position strikes against the screw I3.

The lower end of the supporting member 4 is connected by the pin l4 to the lever l5 and the latter by the pin IE to the lever I! which is itself 0 connected by the pin I8 to one arm of the twoarmed lever l9 (Fig. 2). This lever I9 is in its middle part pivoted on the pin 20 which is held in the lever-like part 2| screwed by means of the nut 22 to the main standard23 of the pullingoff machine.

The other forked end of the two-armed lever I9 embraces the bushing 24 which bears against the helical compression spring 25 which is slipped over the pin 26. The pin 26 is provided with a head and is supported in the standard 23. By means of the nut 21 fitted with a hand wheel the pin can be adjusted.

To the lever [5 of this system of levers is attached by means of. the pin 28 a pull bar 29 which is connected in the usual way with a treadle 38a.

The pulling-off tool consists of a bar 3|] which at the lower end is fitted with rack teeth, with which a toothed Wheel 32 meshes, which is connected to one part of a friction clutch 33 of a known kind, shown in the drawings by broken lines. On this clutch is fixed the pin 34 which, on the part of the clutch 33 turning in the direction indicated by the arrow, strikes against the lug 35 which is pivoted on the pin 36 fixed to the machine standard 23. This lug is connected by means of the pin 36 with the pull rod 38 which is also connected to the treadle 38a. By depressing this treadle 380. not only is the pressure applying tool put in operation, but also the friction clutch for driving the machine is engaged (only part of which is indicated by broken lines).

The bar 30 is slidable in three bearings provided with the bushings 39, 40, 4| and is secured against turning by the screw 42, the end of which slides in the groove 43 of the bar 30.

On the upper end of the bar 30 is mounted the pulling-off tool which consists of, the sleeve 44 which is provided at its lower end with a flange 45 45 fixed to it by several screws. 46 (Figs. 1 and 3). The sleeve is secured against turning by the key 41 and a corresponding groove. At its upper offset end the sleeve 44 is provided with an upper screwed-on flange 48. At the outer, ribbed surface the sleeve is provided with a plurality of fillings 49 of elastic material (Fig. 3), which are fixed by means of the plates 50 screwed on with the screws 5|.

The pulling-off tool can be displaced on the supporting member 4 is inclined towards the pulling-01f tool in opposition to the pressure of the helical spring 25. The swing of the supporting member 4 is limited on the one hand by the stops l2, l3 and on the other hand by this, that the toggle arrangement l5, l1 swings downwards in case the pressure is excessive and that thereby the supporting member 4 and with it the shoe is caused to recede again from the pulling-01f tool.

The treadle 38w at the same time causes the friction clutch (only one part of which is indicated in Fig. 3) to engage, the driven part 33 of which is provided with a pin 34 strikes after one revolution against the lug 35, thereby raising the treadle lever in a positive manner and at the same time disconnecting the fric tion clutch and rendering the machine inoperative. After this raising of the treadle 38a and disconnection of the clutch the bar 30 with the pulling off tool sinks under gravity into its lower position, causing the toothed wheel 32 and the driven part of the coupling 33 connected to it to turn into the original position.

What I claim is:--

l. A machine for pulling shoes off the last, comprising a supporting lever for the last carrying the shoe, a pulling-off tool capable of performing an upward pulling-01f motion, means for pressing the last with the shoe against the pulling-off tool, comprising a toggle arrangement and a pull rod attached to the toggle arrangement, means for producing the disengaging motion of the pulling-off tool, comprising a clutch, a toothed wheel connected to the clutch and a rack in engagement with the toothed wheel, and a treadle arrangement connected to the said pull rod and adapted to operate both the said means.

2. A machine for pulling shoes oif the last, comprising a two-armed supporting lever for the last carrying the shoe, a pivot pin on which the said lever is pivoted at its middle, a screw for adjusting the said pivot pin to suit the size of shoe to be pulled off, a pulling-off tool capable of performing an upward pulling-01f motion, means for pressing the last with the shoe against the pulling-off tool with limited force, comprising a toggle arrangement and a pull rod attached to the toggle arrangement, means for producing the disengaging motion of the pulling-off tool, comprising a clutch, a toothed wheel connected to the clutch and a rack in engagement with the toothed wheel, and a treadle arrangement connected to the said pull rod and adapted to operate both the said means.

3. A machine as claimed in claim 1. in which the pulling-off tool is provided at its external surface with longitudinal grooves having their middle part depressed in the form of a truncated cone with a very obtuse apex angle; in which the heel part of the shoe rests during the pulling off operation. g

4. A machine as claimed in claim 1, in which the pulling-oil tool is provided at its external surface with longitudinal grooves having their middle part depressed in the form of a truncated cone with a very obtuse apex angle, in which the heel part of the shoe rests during, the pulling off operation and comprising a screw and a hand wheel on the screw for vertically adjusting the position of the pulling-off tool to'suit the size of shoe.

JAN A. BATA. 

